Polyimide photosensitive cover coating agent

A photosensitive cover coating agent obtained by mixing a polymer (A) comprising repetition units expressed by the formula ##STR11## wherein R.sup.1 represents ##STR12## and R.sup.2 represents a divalent organic group, a compound (B) having two or more acryloyl groups or methacryloyl groups in one molecule,

• a compound (C) expressed by the formula (II) ##STR13## wherein Z represents a divalent aliphatic group or alicyclic group, R.sup.3 represents a hydrogen atom, a monovalent organic group or a group represented by an aliphatic group, an alycyclic group, an aromatic group, an araliphatic group of 1 to 10 carbon atoms, an unsaturated bond, hydroxyl group, carboxyl group, ether, amide, ester or ketone and R.sup.4 represents a hydrogen atom or --Z--R.sup.3, in 0.01 to 0.80 molar equivalent based upon the compound (B), the total quantity of (B) and (C) being 20 to 200 parts by weight based upon 100 parts by weight of (A) and
• a photopolymerization initiator or a sensitizing agent (D) in a quantity of 0.5 to 20 parts by weight based upon 100 parts by weight of (A).